package com.atguigu.gulimall.cart.interceptor;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.constant.CartConstant;
import com.atguigu.common.vo.MemberEntity;
import com.atguigu.gulimall.cart.vo.Cart;
import com.atguigu.gulimall.cart.vo.UserInfoTo;
import org.apache.commons.lang.StringUtils;
import org.apache.coyote.http11.upgrade.UpgradeServletOutputStream;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.util.UUID;
public class CartInterceptor  implements HandlerInterceptor {
    public static   ThreadLocal<UserInfoTo>  threadLocal=  new ThreadLocal<>();
    /*
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        UserInfoTo userInfoTo = new UserInfoTo();
        HttpSession session = request.getSession();
        MemberEntity member = (MemberEntity) session.getAttribute(AuthServerConstant.LOGIN_USER);
        if(member==null){//说明: 用户没有登录
        }else{   //    说明:  用户登录了
            userInfoTo.setUserId(member.getId());
        }
        Cookie[] cookies = request.getCookies();
        if(cookies !=null  &&  cookies.length>0){
            for (Cookie cookie : cookies) {
                String name = cookie.getName();
                if(name.equals(CartConstant.TEMP_USER_COOKIE_NAME)){
                    userInfoTo.setUserKey(cookie.getValue());
                    userInfoTo.setTempUser(true);
                }
            }
        }
//        return HandlerInterceptor.super.preHandle(request, response, handler);
        if(StringUtils.isEmpty(userInfoTo.getUserKey())){
            String string = UUID.randomUUID().toString();
            userInfoTo.setUserKey(userInfoTo.getUserKey());
        }
        threadLocal.set(userInfoTo);
        return  true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        UserInfoTo userInfoTo = threadLocal.get();
        if(!userInfoTo.isTempUser()){
            Cookie cookie = new Cookie(CartConstant.TEMP_USER_COOKIE_NAME,userInfoTo.getUserKey());
            cookie.setDomain("gulimall.com");
            cookie.setMaxAge(CartConstant.TEMP_USER_COOKIE_TIMEOUT);
            response.addCookie(cookie);
        }
    }
}
